Here is my gear in a Lowepro fastpack 350 http://www.cameralabs.com/forum/viewtopic.php?t=20805That's a D90 with the 18-105 attached and one other lens. There are a few other pockets (not shown) that have a Kata rain cover and some cleaning products in them as well as the battery charger and a spare battery.

The bag is by no means full and could easily take at least two more lenses and a flash unit.

I have ordered both the Lowepro Flipside 400 AW and the Tamrac Expedition 8X Model 5588. As I said in my first post, I'll have to see if the waist strap will go around my large waist (read gut) before I pull out my credit card.

Apparently the Tamrac Model 614 Super Pro 14 is not available here in Australia. When the salesman rang the supplier fr a price, He had never heard of that model.

I also have my laptop in there along with the following in the top compartment

extra 2 CF cards
AA battery grip tray
extra battery
8xAA with charger
2x filters
laptop charger/mouse
and still enough room where I was able to put my friends 24-70 in a pouch and put it in the top compartment.

The Tamrac Expedition 8X Model 5588 has arrived at the shop. I've tried it on and it fits me OK. I will be buying it at the same time as the Lowepro Flipside 400 AW which is due to arrive at the shop on Monday.

The main reason that I need a large bag or backpack is to fit the Joby Gorillapod Focus (which is about 14" with ball head) inside.